How to use Apm for tracing all http request coming in go application, application use `net/http`?

Elastic Observability APM
1

How can add APM tracing in below very simple go code, which use net/http.


package main
import (
    "fmt"
    "net/http"
)
func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintln(w, "Hello, World!")
}
func main() {
    http.HandleFunc("/hello", helloHandler)
    http.ListenAndServe(":8080", nil)
}

Do we use Built-in instrumentation modules | APM Go Agent Reference [2.x] | Elastic module for that how?

New to golang and Apm. I see most of example either with mux or gin.